The document discusses diseases affecting pigeon pea, specifically focusing on wilt caused by Fusarium udum and sterility mosaic caused by emaraviruses. Symptoms of wilt include wilting, yellowing, and blackening of roots, while sterility mosaic results in stunted growth, mosaic patterns, and cessation of flowering. Management practices include using resistant cultivars, crop rotation, and maintaining field sanitation.

1. Diseases of Pigeon
pea
Rani Lakshmi bai central agriculturaluniversity,jhansi
SUBMITTED TO:
Dr. VAIBHAV
Dr. ANITA PUYAM
SUBMITTED BY:
SHALINI SHUKLA
Ag/063/17

2. CONTENTS

3. PIGEON PEA WILT
IMPORTANCE:
CAUSAL ORGANISM: Fusarium udum (host specific)
Destructive in parts of Maharashtra, m.p., u.p.(8.2%) & Bihar (18.3%)
Incidence maximum at: flowering & pod formation
Nematode: Heterodera cajani & root knot nematodes
Fusarium

4. SYMPTO
MS
Wilting of
seedlings &
adult plants
Yellowing,
withering,
drying
Patches
(centrifugal
manner)
Blackening
of main
roots & base
of stem
Partial
wilting
White-
pinkish
cottony mass
on stem base
purple
bands
extending
upwards
from the
base of
main stem

7. Causal organism (etiology)
• Anamorph: Fusarium udum
• Teleomorph: Gibberella indica
• Confined to vascular tissues
• Inter & intra cellular
• Mycelium: hyaline, septate hyphae
• 3 types of spores: micro conidia, macro conidia, chlamydospores

8. Micro conidia
Macro conidia
chlamydospores
SPORES & SURVIVAL STRUCTURE

10. DISEASE CYCLE

11. FAVOURABLE CONDITIONS
 Soil borne
 Survival on: plant debris (3 yrs.)
 Primary inoculum: infected seeds
(Haware & Kannaiyan,1992)
 Secondary inoculum: conidia
 High biomass

12. MANAGEMENT PRACTICES
 Resistant cultivars: ICPL 87, C11 (wilt,
sterility mosaic & Phytophthora blight)
 Crop rotation
 Field sanitation
 Green manuring
 Bacillus subtillis (bulbiformin)

13. PIGEON PEA STERILITY MOSAIC
IMPORTANCE:
• 1st reported in 1931(Pusa, Bihar)
• GREEN PLAGUE
• More loss at early stages(95-100%)
• Max. infection in ratooned & perennial
pigeon pea
• SMD predisposes plants to powdery
mildew & infestation by spider mite

14. SYMPTOMS
Bushy &
pale green
Stunting
Complete
or partial
cessation of
flowering
Severe
mosaic &
sterility
Mild
mosaic &
partial
sterility
Chlorotic
ringspot
without any
noticeable
sterility

18. CAUSAL ORGANISM
• Pigeon pea sterility mosaic emaravirus1 & Pigeon pea sterility
mosaic emaravirus2
• Family: Fimoviridae
• Order: Bunyavirales
• Vector: eriophyid mite (Aceria cajani)- semi-persistent manner
• Highly specific (C.cajan, C.cajanifolius, C.scarabaeoides)
• Segmented, ssRNA,
• Not seed transmitted

20. Aceria cajani
(eriophyid mite)

21. Disease cycle
Not
transmitted
by sap
Aceria
cajani
Retention
pd. 12-
13hrs.
Eggs of
mite do not
transmit

22. FAVOURABLE CONDITIONS
Perennial,
volunteer &
ratooned
pigeon pea
Intermixing
with
sorghum or
millets
Temp:10
℃-35℃SHADE &
HUMIDITY

23. MANAGEMENT PRACTICES
 Resistant Cultivar: BSMR
736 (Gulbarga isolate),
Sabour 2E, ICPL-
146,PANT A-104, Sehore
367
 Tolerant: ICPL-151
 Avoid ratooning (destroy
perennial & ratoon crop)
 Rogue out infected plants.
 Spray acaricides (Kelthane,
Tedion @ 1ml/ Litre water)

24. REFERENCES
 ncbi.nlm.nih.gov
 https://apsjournals.apsnet.org
 Link.springer.com
 Agropedia.iitk.ac.in
 www.biologydiscussion.com
 https://www.plantwise.org>datasheet
 https://www.cabi.org>isc>datasheet

25. THANK YOU